Cheatham hit all four of his three-point attempts and was a perfect 6-of-6 at the free throw line.
Cheatham improved to 22 of 36 from the field (61.1%) for the season. He improved to 7-of-11 from three-point distance.
Henry Ellenson had 15 points and 1o rebounds for his third double-double of the season. Luke Fischer added 11 points and a career-high six blocked shots as Marquette held Jackson State to 36.2% shooting from the field.
After a 1-2 start to the season, Marquette has won three straight to improve to 4-2.